In both stories, the character played by Roger Moore is the target of murder with his intended murderer giving messages of his impending demise before revealing that the motive in wanting to murder the Roger Moore character was that of a brother's revenge.
Brett's full name and title are revealed as Brett Rupert George Robert Andrew Sinclair, Earl of Marnock.
Brett refers to Aunt Sophie, played by Tony Curtis, as "Mrs Schwartz." Tony Curtis's real name is Bernard Schwartz.
During the episode a decoy briefcase was produced and in it was revealed the James Bond books. All these books were turned into films, with Roger Moore playing Bond in films based on three of the books. The appearances of the James Bond books may have something to do with the fact that this episode was directed by Peter Hunt, who had worked on the James Bond films including directing On Her Majesty's Secret Service.
Tony Curtis claims to have given writers the idea for this episode from his earlier film, The Defiant Ones (1958).
Danny takes a telephone call, but it is a wrong number, and he informs the caller that he is not Mr Schwartz. Tony Curtis's real name is Bernard Schwartz.
The prop photograph of the young Brett with his parents and sister is actually a photograph of Roger Moore, his ex-wife Dorothy Squires, and two of his children, Deborah and Geoffrey.
The show's theme tune was the work of one John Barry, who was an established composer largely thanks to his work on the James Bond films.
Brett Sinclair's Aston Martin registration plate bears the initials BS1.